Question

Solve by Substitution method
D
x-y=1;
-x +2y=0​

Answer 1

Step-by-step explanation:

let x-y=1 be the first equation

then x=1+y let it no. [1]

now second equation

-x+2y=0

then 2y=o+x

2y=x let it [2]

put 1 in 2

we get

2y=1+y

then 2y- y=1

and y=1

now put y=1 in 1

we get x= 1+y=1+1=2

x=2

y=1